Lbm Solutions Associate Software Developer Interview Questions and Answers for Experienced

Very basic coding test

10 questions based on simple logic and reasoning

Q1. Hr plus technical round. Some very basic questions that you should know anyways.
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They give a standard application to develop in mvvm or clean architecture, don't forget to write unit tests

Q1. Mostly discuss on the implementation of the project you've done in round one
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Q2. Flutter is addon
Ans. 
Flutter is a UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.
• Flutter is an open-source framework developed by Google.

• It uses the Dart programming language.

• Flutter allows for hot reload, which enables developers to see changes instantly.

• It provides a rich set of pre-built widgets for building user interfaces.

• Flutter can be used to create apps for iOS, Android, w
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Q3. Explain about compose way of thinking.
Ans. 
Compose way of thinking involves breaking down complex problems into smaller, manageable parts and then combining them to create a solution.
• Break down a problem into smaller components

• Solve each component individually

• Combine the solutions to create a complete solution

• Example: Using functions to break down a complex task into smaller functions and then combining them to achieve the desired outcome
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Q4. Difference between presenter and viewmodel
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Q5. Explain about lifecycle of view
Ans. 
Lifecycle of view refers to the stages a view goes through from creation to destruction in an application.
• Creation: View is initialized and loaded into memory.

• Layout: View is positioned and sized on the screen.

• Display: View is rendered and displayed to the user.

• Interaction: User interacts with the view through input events.

• Destruction: View is removed from memory when no longer needed.
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It was an easy test. Multiple choice questions bases on java

Q1. Asked oops concepts, collection, basic multithreading questions.
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Q1. Asked some questions related to projects.
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Q1. Oops, basic ,SQL ,ado
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Curd operation with SQL connectivity

Q1. Basics of your technical skills
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Q1. More Projects related questions
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Q1. Subject related
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Q2. What kind of work daily you can do that.
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Q3. Simple cobol program.what kind of changes in cobol .
Ans. 
Changes in COBOL programs depend on the specific requirements and goals of the project.
• Changes may involve modifying existing code to add new functionality or improve performance.

• Updates may also be necessary to ensure compatibility with new hardware or software systems.

• Refactoring code to improve readability and maintainability is another common change.

• Examples of changes include adding new data fields, modifying cond...read more
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Q1. How much salary u can expect.
Ans. 
The expected salary for a Software Engineer varies depending on factors such as experience, location, and company size.
• The salary range for Software Engineers can vary greatly depending on their level of experience.

• Location plays a significant role in determining salary, with higher salaries typically found in tech hubs like Silicon Valley.

• The size and reputation of the company can also impact salary, with larger compa...read more
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Q1. What are indexes in the database? what is the difference between clustered and non-clustered indexes?
Ans. 
Indexes are used to improve database performance. Clustered indexes determine the physical order of data, while non-clustered indexes do not.
• Indexes are used to speed up data retrieval operations in a database.

• Clustered indexes determine the physical order of data in a table, while non-clustered indexes do not.

• A table can have only one clustered index, but multiple non-clustered indexes.

• Clustered indexes are generally ...read more
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Q2. Write a query to delete duplicate rows from a table.
Ans. 
Query to delete duplicate rows from a table
• Use GROUP BY clause to group the rows by their unique values

• Use HAVING clause to filter out the groups with count greater than 1

• Use DELETE statement to delete the duplicate rows
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Q3. Class A { public string A() { return "hello"; } } what is wrong with above code?
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Q4. What is a singleton pattern and how to implement it?
Ans. 
Singleton pattern restricts the instantiation of a class to a single instance and provides a global point of access to it.
• Create a private constructor to restrict instantiation of the class

• Create a private static instance of the class

• Create a public static method to access the instance

• Ensure thread safety if necessary

• Examples: Database connection, Logger, Configuration settings
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Q5. How do you handle exceptions in stored procedures?
Ans. 
Handle exceptions in stored procedures by using TRY-CATCH blocks.
• Use TRY-CATCH blocks to catch and handle exceptions

• Log the error message and severity level

• Rollback the transaction if necessary

• Rethrow the error if it cannot be handled

• Use RAISERROR to raise custom error messages
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Q6. Explain SOLID principles.
Ans. 
SOLID principles are a set of five design principles that help in creating maintainable and scalable software.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open-Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Subtypes should be substitutable for their base types.

• I - Interface Segregation Principle: C...read more
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Q7. Difference between throw and throw exception?
Ans. 
throw is used to throw an exception while throw exception is used to throw a specific exception.
• throw is used to throw any type of exception while throw exception is used to throw a specific type of exception.

• throw exception is followed by the type of exception that needs to be thrown.

• throw can be used to throw any object while throw exception can only be used to throw an exception object.

• Example: throw new Exception("
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Round duration - 145 minutes
Round difficulty - Hard

The assessment consisted of four components, a code debugging section (20 minutes), a coding test (70 minutes), a workstyles assessment (20 minutes), and a reasoning ability section (35 minutes). The coding environment is very user-friendly and easy to use.

Q1. Rotate matrix to the right
You have been given a matrix ‘MAT’ of size 'N' * 'M' (where 'N' and 'M' denote the number of rows and columns respectively) and a positive integer...read more
Ans. Row-wise rotation
This approach is based on the fact that when we rotate an array to the right by ‘K’ times, it shifts ‘K’ elements from the end to the beginning of the array while the remaining elements shift towards the end. The effective rotations in ‘MAT’ can be from 0 to 'M' - 1, as we get the same matrix ‘MAT’ after every 'M' rotations. So, we will set ‘K’ to ‘K’ % ‘M’.
 
Now, we traverse ‘MAT’ row-wise. We wil...read more
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Q2. Palindrome Partitioning
You are given a string 'S'. Your task is to partition 'S' such that every substring of the partition is a palindrome. You need to return all possible palindrome part...read more
Ans. Backtracking with Dynamic Programming
• We are iterating each time to check whether a given substring is palindrome or not and there we are iterating the same substring of string again and again. So there are overlapping subproblems.
• So we use dynamic programming. To overcome the overlapping subproblems we can initially create the DP table which stores if substring[i….j] is palindrome or not. We maintain a boolean dp[N][N]...read more
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Round duration - 60 Minutes
Round difficulty - Medium

The online round was held on the Amazon Chime platform. The interviewer was very friendly and eager to know what I was thinking for every problem which he asked and always tried to make me speak up my thoughts and approach for solving the specific problem and understand my point too.

Q1. Form the Biggest Number
Given an array “A” of positive integers. Your task is to make the largest number possible formed by concatenating each of the array elements exactly once.
Example:
Let's say t...read more
Ans. Brute Force approach
The idea is to try out all the possible answers one by one and find out the largest one among all of them.
 
To implement this approach, we will generate all the permutations of the first 'N' positive integers and concatenate all the array elements in the order of the permutation.
 
For e.g. N=3 and array A = [ 3, 34, 7 ].
 
Let's generate all the possible answers using the permutations. Le...read more
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Q2. Rat In A Maze
You are given a starting position for a rat which is stuck in a maze at an initial point (0, 0) (the maze can be thought of as a 2-dimensional plane). The maze would be given in the form of a...read more
Ans. Bactracking
Approach: We can start the traversal of the paths from the rat’s starting position, i.e. (0,0) keeping track of the visited cells during the traversal. We will recursively go through all the paths possible until the last index of the grid (destination) is reached, and add the path information using which the rat successfully reached the end.
 
Algorithm is as follows:
 
1. Take the starting position of th...read more
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Round duration - 75 minutes
Round difficulty - Medium

The online round was held on the Amazon Chime platform. The interviewer was very friendly and eager to know what I was thinking for every problem which he asked and always tried to make me speak up my thoughts and approach for solving the specific problem and understand my point too.

Q1.  Infix to Postfix
You are given a string EXP which is a valid infix expression. Convert the given infix expression to postfix expression.
Infix expression is of the form a op b. Where operator is is bet...read more
Ans. Stack
We will scan the expression from left to write and if we encounter an operand we will append it to our answer. If we encounter an operator we will pop all the operators with equal or higher precedence and append them to our answer. And push the current operator. In the end, we will empty the stack.
Order of precedence = [ ‘^’, ‘*’ and ‘/’, ‘+’ and ‘-’, ‘(’, ‘)’]
Order of precedence [ link ]
The algorithm will be-
1. ANS ...read more
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Q2. Level Order Traversal
You have been given a Binary Tree of integers. You are supposed to return the level order traversal of the given tree.
For example:
For the given binary tree
The level order tra...read more
Ans. Breadth First Search
In the level order traversal, we will be using queue data structure which has the property FIRST IN FIRST OUT that’s why which nodes come first in current level the children of that node will also come first for the next level. So, we visit all the nodes one by one of the current level and push into the queue so that when we will be complete with the current level, then we can start exploring nodes ...read more
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Round duration - 60 Minutes
Round difficulty - Medium

The online round was held on the Amazon Chime platform. The interviewer was very friendly and eager to know what I was thinking for every problem which he asked and always tried to make me speak up my thoughts and approach for solving the specific problem and understand my point too.

Q1. Fenwick Tree
You are given an array/list 'ARR' of ‘N’ integers, and ‘Q’ queries. Each query can be of two types:
Given 2 integers ‘L’,’R’ ( L>=0 and R<N ) find the sum of all the elements ...read more
Ans. Brute Force Approach
• The key idea of the approach is to process the queries as asked. i.e If range sum is asked we do a range sum using a loop and update the values in the array if it is an update query.
• Update will be a constant time operation but range sum can take time of order of ‘N’ .
 
We can take the following approach:
 
• For queries of type 1, we take a loop and iterate from ‘L’ to ‘R’ to find the sum and p...read more
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